“+ adjective
Etymology: Latin insincerus, from in- in- (I) + sincerus sincere
: lacking sincerity or genuineness:
a. of a person : not being or expressing what one appears to be or express : hypocritical
a charming but thoroughly insincere woman whose words could never be taken at face value
b. : not based on reality, fact, or an honest appraisal
an insincere denial
the insincere and pity-seeking sigh of a spoilt animal — Arnold Bennett
• in·sincerely “+ adverb